Hash App token (#6724)

1 files changed, 135 insertions, 0 deletions

diff --git a/models/migrations/v85.go b/models/migrations/v85.go
new file mode 100644
index 0000000000..28f6ac146d
--- /dev/null
+++ b/models/migrations/v85.go
@@ -0,0 +1,135 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package migrations
+
+import (
+	"fmt"
+
+	"github.com/go-xorm/core"
+	"github.com/go-xorm/xorm"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/generate"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/util"
+)
+
+func hashAppToken(x *xorm.Engine) error {
+	// AccessToken see models/token.go
+	type AccessToken struct {
+		ID             int64 `xorm:"pk autoincr"`
+		UID            int64 `xorm:"INDEX"`
+		Name           string
+		Sha1           string
+		Token          string `xorm:"-"`
+		TokenHash      string `xorm:"UNIQUE"` // sha256 of token
+		TokenSalt      string
+		TokenLastEight string `xorm:"token_last_eight"`
+
+		CreatedUnix       util.TimeStamp `xorm:"INDEX created"`
+		UpdatedUnix       util.TimeStamp `xorm:"INDEX updated"`
+		HasRecentActivity bool           `xorm:"-"`
+		HasUsed           bool           `xorm:"-"`
+	}
+
+	// First remove the index
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	var err error
+	if models.DbCfg.Type == core.POSTGRES || models.DbCfg.Type == core.SQLITE {
+		_, err = sess.Exec("DROP INDEX IF EXISTS UQE_access_token_sha1")
+	} else if models.DbCfg.Type == core.MSSQL {
+		_, err = sess.Exec(`DECLARE @ConstraintName VARCHAR(256)
+		DECLARE @SQL NVARCHAR(256)
+		SELECT @ConstraintName = obj.name FROM sys.columns col LEFT OUTER JOIN sys.objects obj ON obj.object_id = col.default_object_id AND obj.type = 'D' WHERE col.object_id = OBJECT_ID('access_token') AND obj.name IS NOT NULL AND col.name = 'sha1'
+		SET @SQL = N'ALTER TABLE [access_token] DROP CONSTRAINT [' + @ConstraintName + N']'
+		EXEC sp_executesql @SQL`)
+	} else if models.DbCfg.Type == core.MYSQL {
+		indexes, err := sess.QueryString(`SHOW INDEX FROM access_token WHERE KEY_NAME = 'UQE_access_token_sha1'`)
+		if err != nil {
+			return err
+		}
+
+		if len(indexes) >= 1 {
+			_, err = sess.Exec("DROP INDEX UQE_access_token_sha1 ON access_token")
+		}
+	} else {
+		_, err = sess.Exec("DROP INDEX UQE_access_token_sha1 ON access_token")
+	}
+	if err != nil {
+		return fmt.Errorf("Drop index failed: %v", err)
+	}
+
+	if err = sess.Commit(); err != nil {
+		return err
+	}
+
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	if err := x.Sync2(new(AccessToken)); err != nil {
+		return fmt.Errorf("Sync2: %v", err)
+	}
+
+	if err = sess.Commit(); err != nil {
+		return err
+	}
+
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	// transform all tokens to hashes
+	const batchSize = 100
+	for start := 0; ; start += batchSize {
+		tokens := make([]*AccessToken, 0, batchSize)
+		if err := sess.Limit(batchSize, start).Find(&tokens); err != nil {
+			return err
+		}
+		if len(tokens) == 0 {
+			break
+		}
+
+		for _, token := range tokens {
+			// generate salt
+			salt, err := generate.GetRandomString(10)
+			if err != nil {
+				return err
+			}
+			token.TokenSalt = salt
+			token.TokenHash = hashToken(token.Sha1, salt)
+			if len(token.Sha1) < 8 {
+				log.Warn("Unable to transform token %s with name %s belonging to user ID %d, skipping transformation", token.Sha1, token.Name, token.UID)
+				continue
+			}
+			token.TokenLastEight = token.Sha1[len(token.Sha1)-8:]
+			token.Sha1 = "" // ensure to blank out column in case drop column doesn't work
+
+			if _, err := sess.ID(token.ID).Cols("token_hash, token_salt, token_last_eight, sha1").Update(token); err != nil {
+				return fmt.Errorf("couldn't add in sha1, token_hash, token_salt and token_last_eight: %v", err)
+			}
+
+		}
+	}
+
+	// Commit and begin new transaction for dropping columns
+	if err := sess.Commit(); err != nil {
+		return err
+	}
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	if err := dropTableColumns(sess, "access_token", "sha1"); err != nil {
+		return err
+	}
+	return sess.Commit()
+
+}